Question Answers
Sahay Sir > Question Answers
In the figure below , the switches s 1 and s 2 are closed simultaneously at t = 0 and a current starts to flow in the circuit. Bothe the batteries have the same magnitude of the electromotive force (emf ) and the polarities are as indicated in the figure.
24
Oct
In the figure below , the switches s 1 and s 2 are closed simultaneously at t = 0 and a current starts to flow in the circuit. Bothe the batteries have the same magnitude of the electromotive force (emf ) and the polarities are as indicated in the figure. In the figure below In [...]
A source of constant voltage V is connected to a resistance R and two ideal inductors L 1 and L 2 through a switch S as shown. There is no mutual inductance between the two inductors. The switch S is initially open. At t=0, the switch is closed and current begins to flow. Which of the following options is/are correct?
24
Oct
A source of constant voltage V is connected to a resistance R and two ideal inductors L 1 and L 2 through a switch S as shown. There is no mutual inductance between the two inductors. The switch S is initially open. At t=0, the switch is closed and current begins to flow. [...]
A conducting loop in the shape of a right angled isosceles triangle of height 10 cm is kept such that 90(∘) vertex is very close to an infinitely long conducting wire (see the figure). The wire is electrically insulated from the loop. The hypotenuse of the triangle is parallel to the wire. Current in the triangular loop is in counterclockwise direction and increased at a constant rate of 10 A/s. Which of the following statement(s) is(are) true?
24
Oct
A conducting loop in the shape of a right angled isosceles triangle of height 10 cm is kept such that 90(∘) vertex is very close to an infinitely long conducting wire (see the figure). The wire is electrically insulated from the loop. The hypotenuse of the triangle is parallel to the wire. Current in the [...]
An inductor (L =0.03 H) and a resistor (R=0.15 k(Ω)) are connected in series to a battery of 15 V EMF in a circuit shown below. The key K1 is opened and Key K2 is closed simultaneously. At t = 1 ms, the current in the circuit will be (e5 = 150)
24
Oct
An inductor (L =0.03 H) and a resistor (R=0.15 k(Ω)) are connected in series to a battery of 15 V EMF in a circuit shown below. The key K1 is opened and Key K2 is closed simultaneously. At t = 1 ms, the current in the circuit will be (e5 = 150) An inductor (L [...]
The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb placed
24
Oct
The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb placed The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol [...]
A cylinder of radius R and length l is made up a substance whose thermal conductivity K varies with the distance x from the axis as K = K1x + K2. Determine the effective thermal
24
Oct
A cylinder of radius R and length l is made up a substance whose thermal conductivity K varies with the distance x from the axis as K = K1x + K2. Determine the effective thermal A cylinder of radius R and length l is made up a substance whose thermal conductivity K varies with the [...]
An LCR circuit is equivalent to a damped pendulum. In an LCR circuit the capacitor is charged to Q0 and then connected to the L and R as shown below :
24
Oct
An LCR circuit is equivalent to a damped pendulum. In an LCR circuit the capacitor is charged to Q0 and then connected to the L and R as shown below : An LCR circuit is equivalent to a damped pendulum. In an LCR circuit the capacitor is charged to Q0 and then connected to the [...]
A cylinder is made up of two coaxial layers, one of radius R and the other of radius 2R. The inner and outer portions are respectively made up of substances of thermal conductivities K and 2K.
24
Oct
A cylinder is made up of two coaxial layers, one of radius R and the other of radius 2R. The inner and outer portions are respectively made up of substances of thermal conductivities K and 2K. A cylinder is made up of two coaxial layers one of radius R and the other of radius 2R. [...]
Three rods AB, BC and BD having thermal conductivities in the ratio 1 : 2 : 3 and length in the ratio 2 : 1 :1 are joined as shown in the given figure. The ends A, C and D are at temperatures
24
Oct
Three rods AB, BC and BD having thermal conductivities in the ratio 1 : 2 : 3 and length in the ratio 2 : 1 :1 are joined as shown in the given figure. The ends A, C and D are at temperatures BC and BD having thermal conductivities in the ratio 1 : 2 [...]
One end of a brass rod of length 2.0 m and cross-section 1 cm^2 is kept in stream at 100 C and the other end in ice at 0 C. The lateral surface of the rod is covered by heat insulator.
24
Oct
One end of a brass rod of length 2.0 m and cross-section 1 cm^2 is kept in stream at 100 C and the other end in ice at 0 C. The lateral surface of the rod is covered by heat insulator. One end of a brass rod of length 2.0 m and cross-section 1 cm^2 [...]